Railway-crossing



(No Model.)

(3. H. WHITE. Railway Crossing. No'. 236,130. Patented Dec. 28,1880' UNrrED STATES PATENT OFFICE..

CHARLES H. WHITE, OF BOSTON, MASSACHUSETTS.

RAILWAY-CROSSING.

SPECIFICATION forming part of Letters Patent No. 236,130, dated December 28, 1880l Application sied March 27, iseo. (No model.)

.To all whom It may concern:

Be it known that I, CHARLES H. WHITE, of Boston, in the county of Suft'olk and State of Massachusetts, have invented an Improvement in Railway-Crossings, of which the following is a specification.

My invention relates to improvements in railway-crossings; and it consists in the devices hereinafter described, and pointed out in the claims, whereby the rails forming the crossing are held in position.

In the drawings, Figure l is a plan view of a crossing. Fig. 2 is a section ofthe same on line z z. Fig. 3 is a vert-ical cross-section on the line x x in Fig. 1. Fig. 41s asimilar section on the line y y, Fig. 1. Fig. 5 is a sectional perspective on line w zo.

In the accompanying drawings, which form a part of this specification, A A represent the rails ofthe main line, which are laid in the usual manner as though there was no crossing needed, except as hereinafter described.

B B represent the rails of the intersecting line, the rail B being llaid in the usual manner, while the rail B is gradually elevated toward the ciossingpoint, such elevation being highest at the point a., immediately opposite the end ot' the locking-clamp A, the top of which is preferably slightly above the plane of the top ot' the rail Al of the main track, the extreme point of elevation of the rail B above the plane of the crossing-plate by so much as the dierence between the radius ot' the car-wheel at its largest circumference and the radius of the flange, so that the wheel passing along upon the slightly-elevated rail and upon its tread when it reaches the point a will transfer its bearing-point upon the rail from the tread to the periphery ot' the ange, which will have passed over the top of the rail A of the main line, and lind a bearing upon the steel plate b upon the top of the locking-plate, which will be hereinafter described. The guide-rail C giving the direction to the car for this crossing, the travel ot the opposite wheel to the guide-rail travels upon the top of said steel plate until the tread ot' such wheel is taken up by the spur or head of the rail B3, which forms a continuation of the intersecting track. By this construction all concussion or jar upon the main or intersecting lines at such crossings is entirely avoided.

In order to make and maintain such a crossing it is necessary that both the main and intersecting lines of rail shall be rigidly held in position and in relation to each other; hence I employ for such purpose the following devices:

A represents a locking-clamp constructed in the form substantially as shown in Figs. 3 and 4, the end c being bent or curved, as shown, to support the neck ofthe rail B, and its opposite end, d, rising in a vertical plane and provided With the oiset e. The rail B, elevated as described, rests upon and within a block, B, which performs the double oilce of supporting said rail in its elevated position and holding it rigidly against the shoulder c, while at'the same time it forms a support for the neck and under side of the head of the rail A of the main line. C is another block, which supports the opposite side ot' the rail A', and at the point shown is slotted to receive the foot and neck ofthe rail B. These parts all being in position are then locked in place by the key D or wedge. This construction, as described, is clearly shown in Fig. 3, as found at x .fr in Fig. l.

Fig. 4 shows a cross-section at y yin Fig. l, and is precisely such as has been described, except that the block G is not slotted or recessed to receive the rail B, which is not required at that point.

Care should be takenr that the top ot' the block B should be depressed far enough below the top of the rail Al to prevent the flange of the wheel passing over such rail from striking the block.

The top of the locking-plate and block C is provided with a steel plate, b, which may be secured to such block in any desired or suitable manner.

I am aware that railway-crossings have heretofore been constructed in which one of the rails of the intersecting line is so elevated above the main track at the crossing, and at such a distance from the mainline rail adjacent to it, that the tread of ordinary car-wheels will bear upon the elevated rail until the dan ge of the Wheel has been drawn over the main- IOO track rail adjacent to the elevated rail through the aetion of a guard-rail drawing the carwheels sidewise, the elevation of the rail being such that the ilnnge of the eer-wheel is above the main rail, adj aeent to the elevated rail, and I therefore luy no elnini, broadly7 to sueh eonstruetion.

Vhztt 1 claim as my invention, and desire to secure by Letters Patent, is-

1. As n. means of holding the rails of the main line and interseetin g lines rigidly in position and in relation to each other, the clamp A, blocks B and C, and Wedge D, constructed an d operating substantially as and for the purposes set forth.

2. In @railway-crossing, and in combination with the devices herein described for holding the rails of main and intersecting lines in place, the steel plate b, substantially as and for the purposes set forth.

CHARLES H. W'HITE.

Witnesses:

CHARLES J. HUNT, H. S. SPRAGUE. 

